@first-level-fontSize:18px;
@second-level-fontSize:16px;
@third-level-fontSize:14px;

.first-level-menu{
  font-size: @first-level-fontSize;
  font-weight: bold;;
}
.second-level-menu{
  font-size: @second-level-fontSize;
}

.third-level-menu{
  font-size: @third-level-fontSize;
}

